Far-right congressman Jair Bolsonaro has won Brazil's presidential election, raising fears of a rollback of civil rights and free speech.

Bolsonaro of the Social Liberal Party won about 56 percent of the votes in Sunday's runoff. His left-leaning opponent, Fernando Haddad of the Workers Party, took 44 percent.

Workers' Party presidential candidate Fernando Had
Workers' Party presidential candidate Fernando Haddad delivers his concession speech, in Sao Paulo, Brazil, Sunday, Oct. 28, 2018. Brazil’s Supreme Electoral Tribunal declared far-right congressman Jair Bolsonaro the next president of Latin America’s biggest country.

?Bolsonaro is a former army captain whose far-right rhetoric and promises, and feisty personality earned him the nickname of "Tropical Trump."

President Donald Trump said Monday he had a "very good conversation with the newly election president," and that the two agreed the U.S. and Brazil will work closely together on "Trade, Military and everything else!"

The U.S. State Department on Monday congratulated Bolsonaro on his win as well as the Brazilian people for "participating in a successful election."

"We salute Brazil's strong commitment to democracy," said State Department spokeswoman Heather Nauert.

Bolsonaro, like the U.S. president, paints himself as an anti-establishment outsider. But Bolsonaro spent 27 years in the Brazilian congress.

His win is a voter rejection of the leftist administrations that have governed Brazil for most of the last 15 years. Latin America's largest economy has been stuck in recession since 2014. The political establishment has been rocked by a high-level corruption scandal, and crime and murder rates have spiked.

Supporters of Brazilian presidential candidate Jai
Supporters of Brazilian presidential candidate Jair Bolsonaro cheer as they gather outside his residence in Rio de Janeiro, Brazil, Sunday, Oct. 28, 2018, during the country's presidential runoff election.

?Bolsonaro campaigned for change, describing himself as a law-and-order candidate who will give police more freedom to crack down on crime.

But many Brazilians are disturbed by his professed admiration of the 1964-1985 military dictatorship, and for offensive comments about gays, blacks and women.

They fear a Bolsonaro government will trample on human rights, civil liberties, and free speech — especially by leftists.

Bolsonaro drew protests after claiming a former dictatorship's main mistake was not killing more people, and that if elected, he would shut down Brazil's National Congress. Many Brazilian military leaders reject such talk.

"In terms of the military coming back, I think this is a very remote possibility, if it is a possibility. I think that constitutional Brazil, although imperfect [and] in need of improvement [and] adjustment, will likely prove resilient," said political analyst Paulo Sotero, the director of the Brazil Institute at the Wilson Center in Washington, D.C.

Brazil's government was a military dictatorship from 1964 until the establishment of democracy in 1985. During that period, the military was accused of executing and torturing opponents, and stifling dissent in the name of preventing the spread of communism.

Bolsonaro has been denounced for his offensive comments, such as saying to a female member of Congress that she was not pretty enough to be raped. 

A mentally disturbed assailant stabbed him at a campaign rally in September, causing intestinal damage and sending his poll numbers higher. 

Many business people support Bolsonaro's free-market economic positions, which would stimulate growth by privatizing state-owned enterprises, reduce regulations, and making it easier for foreign investors to enter the Brazilian market.

"He will be judged by his capacity to make the Brazilian economy grow again, sustainably, and create jobs," analyst Sotero said.

Christian evangelicals also support Bolsonaro's promise to end sex education in the schools, keep abortion illegal, and end same-sex marriage.

Brian Padden contributed to this report.